Surface modifications during femtosecond laser ablation in vacuum, air, and water

Sebastien Besner; Jean-Yves Degorce; Andrei V. Kabashin; Michel Meunier

doi:10.1117/12.567746

9 December 2004 Surface modifications during femtosecond laser ablation in vacuum, air, and water

Sebastien Besner, Jean-Yves Degorce, Andrei V. Kabashin, Michel Meunier

Proceedings Volume 5578, Photonics North 2004: Photonic Applications in Astronomy, Biomedicine, Imaging, Materials Processing, and Education; (2004) https://doi.org/10.1117/12.567746
Event: Photonics North, 2004, Ottawa, Ontario, Canada

Abstract

Femtosecond laser ablation technique has been used to process Si and Au targets in vacuum, air and water environment. The threshold of ablation was found to be much lower for Si compared to Au and that was related to much better radiation absorption of Si. The values of the threshold were almost identical for vacuum, air and water in the case of Si (0.4 J/cm² 0.2 J/cm² in the single and multi-pulse irradiation regime, respectively) and Au (0.9 J/cm² and 0.3 J/cm²). Craters on the surface of Si and Au were essentially similar for low fluences, suggesting an involvement of the same radiation-related mechanism of material removal, whereas for high fluences significant differences could take place. In particular, quite different crater morphologies were observed during the laser ablation in water, including ones with nanoporous layers for Si and ones with concentric spheres for Au. The differences of morphologies for high laser fluences were explained by the involvement of plasma-related effects under the processing in relatively dense media.

Citation Download Citation

Sebastien Besner, Jean-Yves Degorce, Andrei V. Kabashin, and Michel Meunier "Surface modifications during femtosecond laser ablation in vacuum, air, and water", Proc. SPIE 5578, Photonics North 2004: Photonic Applications in Astronomy, Biomedicine, Imaging, Materials Processing, and Education, (9 December 2004); https://doi.org/10.1117/12.567746

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